BioMedical Admissions Test (BMAT) Practice Test 2025 - Free BMAT Practice Questions and Study Guide

A short circuit is characterized by the presence of a direct path that allows electrical current to flow with minimal or even negligible resistance. This occurs when conductors bypass the intended load in a circuit—this could be due to a fault or intentional design—leading to an increase in current flow. In practical terms, when a short circuit happens, the current can exceed the normal operating levels, which may create risks such as overheating, potential damage to components, or even fire hazards.

In contrast, a circuit with high resistance would impede current flow rather than facilitate it, which does not align with the definition of a short circuit. Additionally, while a circuit that connects across a resistor could potentially involve a short circuit depending on the configuration, it does not inherently define what a short circuit is. Lastly, a circuit that stops the flow of current does not relate to the concept of a short circuit, as a short circuit is specifically about the unintended pathway that promotes current flow rather than halting it.